Merge branch 'linting' into 'master'

bin/quickview.py

docs/conf.py

setup.cfg

setup.py

src/lagranto/__init__.py

src/lagranto/formats.py

src/lagranto/lagranto.py

src/lagranto/plotting.py

src/lagranto/tools.py

tests/paths.py

tests/test_format.py

tests/test_lagranto.py

tests/test_lagranto_plotting.py

tests/test_lagranto_tools.py

tests/test_lagrantorun.py